Sewing machine



Sept. 27, 1932-. F, PALME 1,879,449

SEWING MACHINE Filed Jan. 7, 1931 3 Sheets-Sheet l Josef i. Palme Sept.27, 1932. J PALME 1,879,449

SEWING MACHINE Filed Jan. 7, 1951 5 Sheets-Sheet 2 Witwe o= Sept. 27,1932.

J. F. PALME SEWING MACHINE Filed Jan. '7. 1931 5 Sheets-Sheet 3' Wi Wewgwuanio'o Josef 1 Palme 4 Patented Sept. 27, 1932 UNITED STATE-S PATENT:oFFIcE IosEE F. PALME, F ELIZABETH, NEW .IERsEY, AssIGNoR To HE SINGERMANUEAc- TURING COMPANY, OF ELIZABETH, 'NEw'JERsEY, A coRPoRATIo on NEWJERSEY .SEWING MACHINE Application filed January 7,' 1931. Serial No.507,075.

This invention relates to sewing machines, more particularly of the typehaving. laterally vibrating needle and loop-taking devices adapted forthe formation of zigzag stitches, and has for an object to reduce thenumber of working parts and otherwise simplify and improve theneedle-bar and looptaker vibrating mechanism of the machine disclosed inthe patent to A. Grieb, No. 1,197,735, of Sept. 12, 1916, whilemaintaining ample room under thegooseneck of the machine for theaccommodation and passage of the work. v

The invention comprises the devices, combinations and arrangements ofparts hereinafter more particularly described and pointed out in theclaims. I A

The features of the invention and'the ad? vantages attained thereby willbe readily r. understood by those skilled inthe art from,

the following detailed description of a pre-j ferred embodiment of theinvention illutrated in the accompanying drawings in which Fig. 1 is aside elevation of a sew ng machine embodying the invention. Fig, 2

is a horizontal section through the gooseneck of the machine,showing thebed and bed-' mechanism in plan. Fig. 3 is a section substantially onthe line 3-3, Fig. 1. Fig. 4 is an end elevation of the machine lookingfrom the left of Fig. 1 and Fig. 5 is a section on the line 5--5,Fig. 1. V v

The machine is formed witha frame having a bed 1 and an overhanginggooseneck 2 including the upright member or standard 3 and overhangingarm 4 terminating in the head 5.

Pivotally mounted on the. stud 6 fixed to the head 5 is the vibratoryneedle-bar-carrier 7 having upper and lower bearings, 8 and 9,respectively, for the reciprocating needle bar 10 carrying the needle11. p

The needle-bar is reciprocated by means of the usual link-connection 12with the ricedle-bar actuating lever 13 fulorumedat 14 on the gooseneck2 and connected at itsrear end to the pitman 15 which is actuatedby theeccentric 16 on the main-shaft 17 journaled in the bed 1; theconstructive features 50 so far described being substantiallyinaccordance with the disclosure, of the Grieb patent previouslyreferred to.

The feeding mechanism of the machine includes the usual four-motionfeed-dog 18 whichcooperates with the usual presser-foot 19 and isactuated by any suitablemechanism, preferably that disclosed in theGrieb patent referred to.

Cooperating with the needle 11 is the looptaker 20, preferably in theform of the well known rotary chain-stitch-looper having the usualloop-seizing beak 21 and loop-spreading wing 22. The looper is securedto the -.looper-shaft. 23 which is journaled in the looper-carrier orsleeve 24 slidably mounted in the bearing-bushing 25 in the bed 1. The

. sleeve 24 is formed at one end with a blockshaped head 26 to which issecured by the screw 27 one end of the needle-throat member 28 slidablymountedin the fixed guide way 29 and formed at its free end with aneedle-aperture 30. The connection of the sleeve 24 with theneedle-throat member 28 through the sleeve-head 26 fixes the sleeve 24against rotation in the bushing 25 and maintains the aperture 30 and thelooper 20 in fixed operative relation to one another. Fixed to the endof the looper-shaft 23, remote from the looper 20, is the couplingcollar 31 formed with the diametrical slot 32 which is entered by theflat tongue 33 formed on the end of the main-shaft 17. Thetongueand-slot: connection between the looper-shaft 23, and themain-shaft 17 transmits rotary .motion from the main-shaft to the looper20 while permitting the looper and throatplate assembly 24, 26,28 to bevibrated or reciprocated laterally of the line of feed.

Rigidly secured to the needle-bar-carrier 7 by screws 35 is one end ofthe arm 36 which is gooseneck shaped and roughly parallels theframe-gooseneck 2, i. e., the arm 36 has an upper laterally extendingportion 36 and a downwardly extending portion 36" the arm 36, as awhole, being bowed away from the line of feed so as to provide spaceunder the arms 2 and 36 for the accommodation and passage of thework.The downwardly extending portion 36" of the arm 36 may be slidablyreceived in the slot 37 of-the bracket 38 fixed to the bed 1 so as to besteadied by such bracket. The arm 36 has connected to it, by means ofthe screw 39 adjacent its lower end and below the level of the pivotstud6, one end of a link 40, the other end of which is connected by thescrew 41 to the arm 42 fixed by means of the screws 43 to the headblock26 of the sleeve 24. The link connects the needle-barand looper-carrierstogether and causes them to move in unison laterally of the line offeed.

To actuate the connected needle-barand looper-carriers 7 and 24, thereis connected to the arm 36 by the screw 44 below the level of thepivot-stud 6, one end of the link 45, the opposite end of which is adjustably connected to the slotted arm 46 of a rock-lever fulcrumed'at 47on the frame of the machine and having a downwardly extending arm 48which carries a roller 49 entering the camslot 50 in the barrel-cam 51which is journaled to rotate on the stationary shaft 52 fixed to thebed-lug 53. The barrel-cam 51 has a gear-toothed portion 54 which mesheswith the pinion 55 fixed to the main-shaft 17. The ratio of gearingbetween the pinion 55 and the gear 54 isas one is to two; the cam 51rotating at one-half the speed of the mainshaft 17. The cam 50 is soshaped as to vibrate the needle and looper laterally of the line of feedand hold them in their extreme positions while the needle is penetratingthe work and presenting its loop to the/looptaker; the lateral shiftbeing efl'ected while the needle is out of the work. The throw or extentof lateral vibration of theneedle and looper may be varied byadjustingthe upper end of the link 45 along the slot in the arm 46; Theslot in the armt46 is curved-in the arc of a circle about the screw4421s a center when the needle and'looper are intheir mid-' position, inwhich position the needle-bar is vertical. By adjusting the link 45 intoalinement with the centers 44 and 47, the lateral vibratory movementsofthe needle and looper may be practically eliminated, in which positionof adjustment the machine may be used for straight-away sewing.

It will be seen in Fig. 1 that the pivot-point 39 for the link 40, beingbelow the pivotstud 6 has both a vertical and a horizontal component ofmotion, the latter of which is transmitted by the link 40 to thelooper-carrier'24which is moved simultaneously with and in the samedirection laterally of the line of feed as the needle 11. 7

Having thus set forth the nature of the invention, what I claim hereinis:

I 1. In a sewing machine, in combination,

feeding mechanism, a pivotally mounted needle-bar-carrier, alooper-carrier movable laterally of the line of feed, an arm rigidlysecured at one end to said needle-bar-carrier and connected at its otherendto said-loopercarrier, said arm being bowed between its ends awayfrom the line of feed, and means for vibrating said arm, said other endof said arm being below the level of the pivot-point of the needle-'barcarrier.

3. In a sewing machine, in combination, feeding mechanism, a pivotallymounted needle-bar-carrier, a looper-carrier movable laterally of theline of feed, an arm rigidly secured at one end to said needle-barcarrier, a link'connected between the other end of said arm and'saidlooper-carrier, said arm being bowed between its ends away from the lineof feed, and means for vibrating said arm.

4. In a sewing machine, in combination, feeding mechanism, a pivotallymounted needle-bar-carrier, a looper-carrier movable laterally of theline of feed, an arm rigidly secured at one end to saidneedle-bar-carrier and connected at its other end to said loopercarrier,said arm 'being bowed between its ends away from the line of feed, andmeans for vibrating said arm, saidother end of said arm being below thelevel of the pivot-point of the needle-bar-carrier, said means includinga rocking member and a link connected at one end to said rocking memberand at its other end to said arm, said link having its point ofconnection with said arm below the level of the pivot-point-jof saidneedle-barcarrier.

5. A sewing machine having a frame formed with a gooseneck, a vibratoryneedlefeed, a reciprocating needle-bar in said carrier, a needle carriedby said needle-bar, a loop-taker cooperating with said needle andmounted in said bed for movement laterally of the line of feed, an armrigidly secured at one end tosaid needle-bar-carrier and having its freeend terminating below said gooseneck and adjacent said bed, said armbeing bowed in the same direction as the bend of said

